<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addDialogVisible=true">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色区域列表 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
                            v-for="(item1,i1) in scope.row.children" :key="item1.di">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}
                                </el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!--渲染二级和三级权限-->
                            <el-col :span="19">
                                <!--嵌套渲染二级权限-->
                                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                                    v-for="(item2,i2) in item1.children" :key="item2.id">
                                    <el-col :span="6">
                                        <el-tag closable type="success" @close="removeRightById(scope.row,item2.id)">
                                            {{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <!--渲染三级权限-->
                                    <el-col :span="18">
                                        <el-tag closable @close="removeRightById(scope.row,item3.id)" type="warning"
                                            v-for="item3 in item2.children" :key="item3.id">
                                            {{item3.authName}}</el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <el-table-column type="index">
                </el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">
                            编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size="mini"
                            @click="removeRoleById(scope.row.id)">删除
                        </el-button>
                        <el-button type="warning" icon="el-icon-setting" size="mini"
                            @click="showSetRightDialog(scope.row)">分配权限
                        </el-button>
                    </template>
                </el-table-column>
            </el-table>

            <!-- 分配权限的对话框 -->
            <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
                <!-- 树形控件 -->
                <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all
                    :default-checked-keys="defKeys" ref="treeRef"></el-tree>
                <span slot="footer" class="dialog-footer">
                    <el-button @click="setRightDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="allotRights">确 定</el-button>
                </span>
            </el-dialog>

            <!-- 添加角色相关 -->
            <el-dialog title="添加角色" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
                <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px">
                    <el-form-item label="角色名称" prop="roleName">
                        <el-input v-model="addForm.roleName"></el-input>
                    </el-form-item>
                    <el-form-item label="角色描述" prop="roleDesc">
                        <el-input v-model="addForm.roleDesc"></el-input>
                    </el-form-item>
                </el-form>
                <span slot="footer" class="dialog-footer">
                    <el-button @click="addDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="addRoles">确 定</el-button>
                </span>
            </el-dialog>

            <!-- 修改用户的对话框 -->
            <el-dialog title="修改角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
                <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
                    <el-form-item label="用户名称">
                        <el-input v-model="editForm.roleName"></el-input>
                    </el-form-item>
                    <el-form-item label="用户描述" prop="email">
                        <el-input v-model="editForm.roleDesc"></el-input>
                    </el-form-item>
                </el-form>
                <span slot="footer" class="dialog-footer">
                    <el-button @click="editDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="editRoleInfo">确 定</el-button>
                </span>
            </el-dialog>
        </el-card>
    </div>

</template>

<script >
    export default {
        name:'Roles',
        data() {
            return {
                //角色列表数据
                rolelist:[],
                //分配权限对话框
                setRightDialogVisible:false,
                //所有权限的数据
                rightslist:[],
                //树形控件的属性绑定对象
                treeProps:{
                    label:'authName',
                    children:'children'
                },
                //默认选中的节点Id值数组
                defKeys:[],
                //当前即将分配权限的角色id
                roleId:'',
                //添加角色弹窗是否可见
                addDialogVisible: false,
                //添加角色的表单数据
                addForm: {
                    roleName: '',
                    roleDesc: ''
                },
                // 添加表单的验证规则对象
                addFormRules: {
                    roleName: [
                        { required: true, message: '请输入角色名称', trigger: 'blur' },
                        {
                            min: 1,
                            max: 12,
                            message: '角色名称的长度在1~12个字符之间',
                            trigger: 'blur'
                        }
                    ]
                },
                editFormRules: {
                    roleName: [
                        { required: true, message: '请输入角色名称', trigger: 'blur' },
                        {
                            min: 1,
                            max: 12,
                            message: '角色名称的长度在1~12个字符之间',
                            trigger: 'blur'
                        }
                    ]
                },
                // 控制修改用户对话框的显示与隐藏
                editDialogVisible: false,
                // 查询到的用户信息对象
                editForm: {},

            }
        },
        created() {
            this.getRoleList()
        },
        methods: {
            async getRoleList(){
                const {data:res} =  await this.$http.get('roles')
                if (res.meta.status !== 200) {
                    return this.$message.error('获取角色列表失败！')
                }
                this.rolelist = res.data
            },
            async removeRightById(role,rightId){
                const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err=>err)
                if(confirmResult !=='confirm'){
                    return this.$message.info('取消了删除！')
                }
                const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
                if (res.meta.status !== 200) {
                    return this.$message.error('删除权限失败！')
                }
                role.children = res.data
            },
            //展示分配权限的对话框
            async showSetRightDialog(role){
                this.roleId = role.id
                //获取所有权限的数据
                const { data: res } = await this.$http.get(`rights/tree`)
                if (res.meta.status !== 200) {
                    return this.$message.error('获取权限失败！')
                }
                //把获取到的权限数据保存到data中
                this.rightslist = res.data
                //递归获取三级节点的Id
                this.getLeafKeys(role,this.defKeys)

                this.setRightDialogVisible = true
            },
            //通过递归的形式，获取角色下所有三级权限的id，并保存到defKeys数组
            getLeafKeys(node,arr){
                //如果当前node节点不包含children属性则是三级节点
                if (!node.children) {
                    return arr.push(node.id)
                }
                node.children.forEach(item=>this.getLeafKeys(item,arr))
            },
            //监听分配权限对话框的关闭事件
            setRightDialogClosed(){
                this.defKeys= []
            },
            // 点击按钮，添加新角色
            addRoles() {
                this.$refs.addFormRef.validate(async valid => {
                    if (!valid) return
                    // 可以发起添加用户的网络请求
                    const { data: res } = await this.$http.post('roles', this.addForm)

                    if (res.meta.status !== 201) {
                        this.$message.error('添加角色失败！')
                    }

                    this.$message.success('添加角色成功！')
                    // 隐藏添加用户的对话框
                    this.addDialogVisible = false
                    // 重新获取用户列表数据
                    this.getRoleList()
                })
            },
            //点击为用户分配权限
            async allotRights() {
                //获取所有选中及半选的内容
                const keys = [
                    ...this.$refs.treeRef.getCheckedKeys(),
                    ...this.$refs.treeRef.getHalfCheckedKeys()
                ]
                //将数组转换为 , 拼接的字符串
                const idStr = keys.join(',')
                //发送请求完成更新
                const { data: res } = await this.$http.post(
                    `roles/${this.roleId}/rights`,
                    { rids: idStr }
                )
                if (res.meta.status !== 200)
                    return this.$message.error('分配权限失败')
                this.$message.success("分配权限成功")
                this.getRoleList();
                //关闭对话框
                this.setRightDialogVisible = false;
            },
            //监听增加对话框关闭事件重置
            addDialogClosed() {
                this.$refs.addFormRef.resetFields()
            },
            // 根据Id删除对应的角色信息
            async removeRoleById(id) {
                console.log(id);
                // 弹框询问用户是否删除数据
                const confirmResult = await this.$confirm(
                    '此操作将永久删除该角色, 是否继续?',
                    '提示',
                    {
                        confirmButtonText: '确定',
                        cancelButtonText: '取消',
                        type: 'warning'
                    }
                ).catch(err => err)
                if (confirmResult !== 'confirm') {
                    return this.$message.info('已取消删除')
                }
                const { data: res } = await this.$http.delete('roles/' + id)
                if (res.meta.status !== 200) {
                    return this.$message.error('删除角色失败！')
                }
                this.$message.success('删除角色成功！')
                this.getRoleList()
            },
            // 展示编辑角色的对话框
            async showEditDialog(id) {
                const { data: res } = await this.$http.get('roles/' + id)
                if (res.meta.status !== 200) {
                    return this.$message.error('查询角色信息失败！')
                }

                this.editForm = res.data
                this.editDialogVisible = true
            },
            // 监听修改角色对话框的关闭事件
            editDialogClosed() {
                this.$refs.editFormRef.resetFields()
            },
            // 修改角色信息并提交
            editRoleInfo() {
                this.$refs.editFormRef.validate(async valid => {
                    if (!valid) return
                    console.log(this.editForm);
                    // 发起修改用户信息的数据请求
                    const { data: res } = await this.$http.put(
                        'roles/' + this.editForm.roleId,
                        {
                            roleName: this.editForm.roleName,
                            roleDesc: this.editForm.roleDesc
                        }
                    )
                    if (res.meta.status !== 200) {
                        return this.$message.error('更新用户信息失败！')
                    }
                    // 关闭对话框
                    this.editDialogVisible = false
                    // 刷新数据列表
                    this.getRoleList()
                    // 提示修改成功
                    this.$message.success('更新角色信息成功！')
                })
            },
            
        },

    }
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}

</style>